Insulating pull rod of circuit breaker

Abstract

The utility model relates to the technical field of electrical devices, and discloses a circuit breaker insulation pull rod, which comprises an insulation pull rod main body, and a first extension rod is slidably connected in the insulation pull rod main body. According to the circuit breaker insulation pull rod, the transmission rod is pushed to drive the clamping block to be separated from the interior of the clamping groove, fixing of the connecting block can be relieved, at the moment, the first extension rod and the second extension rod can be pulled out of the interior of the insulation pull rod body and extend outwards, and the length and the shape of the insulation pull rod body can be adjusted according to actual needs; according to the utility model, the insulation pull rod main body is arranged to adapt to different installation environments and operation requirements, the flexibility is high, the adaptability and universality of the equipment are improved, and the contraction design is utilized, so that the insulation pull rod main body is more convenient and faster when the circuit breaker is maintained, overhauled or replaced, and the insulation pull rod main body in the contraction state is easier to fix and protect; and the damage risk caused by mistaken touch or external force is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical devices, in particular to an insulating pull rod of a circuit breaker. Background Art

[0002] As a key component in the power system, the insulating pull rod of the circuit breaker is widely used in high-voltage, extra-high-voltage and ultra-high-voltage circuit breakers and other equipment. It not only bears the function of transmitting the operating power, but also must have excellent insulation performance to ensure the safety and reliability of the circuit breaker during the opening and closing processes.

[0003] A Chinese patent discloses an insulating pull rod of a circuit breaker (authorization announcement number ), and the patented technology has the advantages of simple structure, high connection strength, good integrity, low production cost, and is convenient for popularization and use.

[0004] In view of the above and related existing technologies, the inventor believes that the following defects often exist: in the existing insulating pull rod of the circuit breaker during use, a fixed design is often adopted, so more disassembly steps are required, and the length and shape cannot be adjusted according to actual needs to adapt to different installation environments and operating requirements. For example, inside high-voltage electrical equipment, the space is usually very limited, resulting in inconvenient operation of the insulating pull rod during use, low flexibility, and reduced adaptability and versatility of the equipment. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is that in the prior art, during the use of the insulating pull rod of the circuit breaker, a fixed design is adopted, and the length and shape cannot be adjusted according to actual needs to adapt to different installation environments and operating requirements. For this reason, we propose an insulating pull rod of a circuit breaker.

[0006] In order to achieve the above purpose, the present application adopts the following technical solution: an insulating pull rod of a circuit breaker, including an insulating pull rod main body, a first extension rod is slidably connected inside the insulating pull rod main body, a second extension rod is slidably connected inside the first extension rod, a joint is installed at the top of the second extension rod, an insulating shell is fixed on the surface of the second extension rod, a rainproof sleeve is arranged on the surface of the insulating pull rod main body, a connecting block is fixed on the surface of the insulating shell, a housing is fixed above the rainproof sleeve on the surface of the insulating pull rod main body, two sides inside the housing are both slidably connected with sliding rods, a round plate is fixed at one end of the sliding rod, a transmission rod is fixed at the other end of the sliding rod, a clamping block is fixed at the top of the transmission rod, and clamping grooves matched with the clamping block are formed on both sides of the connecting block.

[0007] Preferably, fixed rods are fixed on both sides inside the housing, a through groove is formed on the surface of the transmission rod, and the through groove is slidably connected with the fixed rod inside.

[0008] Preferably, elastic pieces are fixed on both sides inside the housing, and the other ends of the elastic pieces are fixed to the transmission rod.

[0009] Preferably, the diameter of the sliding rod outside the housing is greater than the distance at which the clamping block is inserted into the clamping groove.

[0010] Preferably, sliding grooves for cooperating with the sliding rod are formed on both sides of the housing.

[0011] Preferably, threaded holes are formed on the surfaces of the insulating pull rod main body and the first extension rod, and bolts are threadedly connected inside the threaded holes.

[0012] Preferably, a gasket is slidably connected to the surface of the bolt.

[0013] Technical effects and advantages of the present utility model:

[0014] In the present utility model, by pressing the circular plate to drive the sliding rod to move into the housing, pushing the transmission rod to drive the clamping block to disengage from the inside of the clamping groove, the fixing of the connecting block can be released. At this time, the first extension rod and the second extension rod can be pulled out from the inside of the insulating pull rod main body and extended outwards, so that the insulating pull rod main body can adjust its length and shape according to actual needs to adapt to different installation environments and operation requirements, with high flexibility, and improve the adaptability and versatility of the equipment. At the same time, with the retractable design, the insulating pull rod main body is more convenient and quick for maintaining, overhauling or replacing the circuit breaker, and the insulating pull rod main body in the retracted state is also easier to fix and protect, reducing the risk of damage caused by accidental touch or external force. Brief Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the present utility model;

[0016] Figure 2 is the disassembled structural schematic diagram of the present utility model;

[0017] Figure 3 is the internal cross-sectional structural schematic diagram of the housing of the present utility model;

[0018] Figure 4 is the disassembled structural schematic diagram of the bolt of the present utility model.

[0019] Legend Explanation: 1. Insulating pull rod main body; 2. First extension rod; 3. Second extension rod; 4. Connector; 5. Insulating housing; 6. Rainproof cover; 7. Connecting block; 8. Housing; 9. Sliding rod; 10. Circular plate; 11. Transmission rod; 12. Clamping block; 13. Clamping groove; 14. Fixed rod; 15. Through groove; 16. Elastic piece; 17. Sliding groove; 18. Threaded hole; 19. Bolt; 20. Gasket. Detailed Description of the Embodiment

[0020] The present utility model will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0021] Referring to Figures 1 - 4 As shown, the present utility model provides a technical solution: a circuit breaker insulating pull rod, which includes an insulating pull rod main body 1. A first extension rod 2 is slidably connected inside the insulating pull rod main body 1. A second extension rod 3 is slidably connected inside the first extension rod 2. A joint 4 is installed at the top of the second extension rod 3. An insulating shell 5 is fixed on the surface of the second extension rod 3. A rainproof sleeve 6 is arranged on the surface of the insulating pull rod main body 1. A connecting block 7 is fixed on the surface of the insulating shell 5. A housing 8 is fixed above the rainproof sleeve 6 on the surface of the insulating pull rod main body 1. Slide rods 9 are slidably connected to both sides inside the housing 8. A circular plate 10 is fixed at one end of the slide rod 9. A transmission rod 11 is fixed at the other end of the slide rod 9. A clamping block 12 is fixed at the top of the transmission rod 11. Slots 13 that cooperate with the clamping block 12 are formed on both sides of the connecting block 7. By pressing the circular plate 10 to drive the slide rod 9 to move into the housing 8, the transmission rod 11 is pushed to drive the clamping block 12 to disengage from the inside of the slot 13, and the fixation of the connecting block 7 can be released. At this time, the first extension rod 2 and the second extension rod 3 can be pulled out from the inside of the insulating pull rod main body 1 and extended outward, so that the insulating pull rod main body 1 can adjust its length and shape according to actual needs to adapt to different installation environments and operation requirements, with high flexibility, and improve the adaptability and versatility of the equipment. At the same time, with the retractable design, it is more convenient and fast to maintain, repair or replace the circuit breaker with the insulating pull rod main body 1, and the insulating pull rod main body 1 in the retracted state is also easier to fix and protect, reducing the risk of damage caused by accidental touch or external force.

[0022] Referring to Figure 3 As shown, in this embodiment: Fixed rods 14 are fixed to both sides inside the housing 8. A through groove 15 is formed on the surface of the transmission rod 11, and the inside of the through groove 15 is slidably connected to the fixed rod 14. By setting the structure of the fixed rod 14 and the through groove 15, the moving trajectory of the transmission rod 11 can be restricted to avoid tilting.

[0023] Referring to Figure 3 As shown, in this embodiment: Elastic pieces 16 are fixed to both sides inside the housing 8, and the other end of the elastic piece 16 is fixed to the transmission rod 11. By setting the elastic pieces 16, after the first extension rod 2 and the second extension rod 3 are retracted into the insulating pull rod main body 1 and the connecting block 7 is reset, the elastic force of the elastic pieces 16 is used to push the transmission rod 11 to drive the clamping block 12 to insert into the inside of the slot 13 to fix the connecting block 7.

[0024] Referring to Figure 3As shown, in this embodiment: the diameter of the slide rod 9 located outside the shell 8 is larger than the distance of the block 12 inserted into the slot 13. By designing the diameter of the slide rod 9 located outside the shell 8 to be larger than the distance of the block 12 inserted into the slot 13, it can be ensured that the moving distance of the transmission rod 11 can make the block 12 disengage from the inside of the slot 13.

[0025] Reference Figure 3 As shown, in this embodiment: both sides of the shell 8 are provided with slide grooves 17 used in conjunction with the slide rod 9. By providing the slide grooves 17, the movement trajectory of the slide rod 9 can be restricted, thereby improving the stability of the slide rod 9.

[0026] Reference Figure 4 As shown, in this embodiment: the surfaces of the insulating pull rod body 1 and the first extension rod 2 are both provided with threaded holes 18, and the internal threads of the threaded holes 18 are connected with bolts 19. By setting the structure of the threaded holes 18 and the bolts 19, the first extension rod 2 and the second extension rod 3 can be quickly fixed when the first extension rod 2 and the second extension rod 3 are extended to a suitable length.

[0027] Reference Figure 4 As shown, in this embodiment: a gasket 20 is slidably connected to the surface of the bolt 19. By providing the gasket 20, the firmness of the bolt 19 to the first extension rod 2 and the second extension rod 3 inside the threaded hole 18 can be improved to avoid loosening after long-term use.

[0028] Working principle: The user presses the circular plate 10 to drive the slide rod 9 to move into the housing 8, pushes the transmission rod 11 to drive the clamping block 12 to disengage from the inside of the clamping groove 13, and can release the fixation of the connecting block 7. At this time, the first extension rod 2 and the second extension rod 3 can be pulled out from the inside of the insulating pull rod main body 1 and extended outward, so that the insulating pull rod main body 1 can adjust its length and shape according to actual needs to adapt to different installation environments and operation requirements, with high flexibility, and improve the adaptability and versatility of the equipment. At the same time, using the retractable design makes the insulating pull rod main body 1 more convenient and fast when maintaining, overhauling or replacing the circuit breaker. Moreover, the insulating pull rod main body 1 in the retracted state is also easier to fix and protect, reducing the risk of damage caused by accidental contact or external force. By setting the structure of the fixed rod 14 and the through groove 15, the movement track of the transmission rod 11 can be restricted to avoid tilting. By setting the elastic piece 16, after the first extension rod 2 and the second extension rod 3 are retracted into the insulating pull rod main body 1 and the connecting block 7 is reset, the elastic force of the elastic piece 16 is used to push the transmission rod 11 to drive the clamping block 12 to insert into the inside of the clamping groove 13 to fix the connecting block 7. By designing the diameter of the slide rod 9 outside the housing 8 to be greater than the distance when the clamping block 12 inserts into the inside of the clamping groove 13, it can be ensured that the moving distance of the transmission rod 11 can make the clamping block 12 disengage from the inside of the clamping groove 13. By setting the sliding groove 17, the movement track of the slide rod 9 can be restricted to improve the stability of the slide rod 9. By setting the structure of the threaded hole 18 and the bolt 19, the first extension rod 2 and the second extension rod 3 can be quickly fixed when they extend to an appropriate length. By setting the gasket 20, the firmness of the bolt 19 in the threaded hole 18 for the first extension rod 2 and the second extension rod 3 can be improved, avoiding loosening during long-term use.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker insulating pull rod, comprising an insulating pull rod main body (1), characterized in that: A first extension rod (2) is slidably connected inside the insulating pull rod body (1), a second extension rod (3) is slidably connected inside the first extension rod (2), a joint (4) is installed at the top of the second extension rod (3), an insulating outer shell (5) is fixed on the surface of the second extension rod (3), a rainproof sleeve (6) is arranged on the surface of the insulating pull rod body (1), a connecting block (7) is fixed on the surface of the insulating outer shell (5), a housing (8) is fixed above the rainproof sleeve (6) on the surface of the insulating pull rod body (1), sliding rods (9) are slidably connected to both sides inside the housing (8), a circular plate (10) is fixed at one end of the sliding rod (9), a transmission rod (11) is fixed at the other end of the sliding rod (9), a clamping block (12) is fixed at the top of the transmission rod (11), and clamping grooves (13) for cooperating with the clamping block (12) are formed on both sides of the connecting block (7).

2. The insulating pull rod of a circuit breaker according to claim 1, wherein: Fixed rods (14) are fixed to both sides inside the housing (8), a through groove (15) is formed on the surface of the transmission rod (11), and the through groove (15) is slidably connected to the fixed rod (14).

3. The insulating pull rod of a circuit breaker according to claim 1, characterized in that: Elastic sheets (16) are fixed to both sides inside the housing (8), and the other ends of the elastic sheets (16) are fixed to the transmission rod (11).

4. A circuit breaker insulating pull rod according to claim 1, characterized in that: The diameter of the sliding rod (9) outside the housing (8) is greater than the distance for the clamping block (12) to insert into the clamping groove (13).

5. A circuit breaker insulating pull rod according to claim 1, characterized in that: Chute grooves (17) for cooperating with the sliding rod (9) are formed on both sides of the housing (8).

6. A circuit breaker insulating tie rod according to claim 1, characterized in that: Threaded holes (18) are formed on the surfaces of the insulating pull rod body (1) and the first extension rod (2), and bolts (19) are threadedly connected inside the threaded holes (18).

7. A circuit breaker insulating pull rod according to claim 6, characterized in that: A gasket (20) is slidably connected to the surface of the bolt (19).

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